Ann: Updated Ore Reserve Delivers 17.9% Graphite Grade, page-102

I think the key with oppies ATM is that once WKT runs hard ( presumably after DFS/offtake/finance) then the oppies offer excellent leverage.
As an example when SP is 15c and Oppies are at 5c, When the SP runs to 30c (100%) then oppies with no time premium are trading at 15c or (200%). This is why with good news in the pipeline the oppies will continue to trade at a premium. Still plenty of time to double or triple your investment on oppies. A lot of people who don't have the additional cash to get a big chunk of heads can buy oppies now and convert at the end of the year. Sure you will pay abit more overall but it is like buy now pay later deals offered by retailers on TVs etc.